Improvement in oast huts



einer @Hirev` l, @niet .time

,HA-VEN v AND COMPANY, OF SAME PLACE.

Letters PaeMtNISlASO, 'dated August ISGS.

IMPROVEMENT IN GAST NUTS.

tlgerlgrhitle refemh tu in tlgrse @niet kntent mi milking mi nf tigeimm'.

Beit kno/wn that I; GEORGE PsDARROW, of Oin-xeinnat'i, IIaimilton-.county, Ohio, have invented a. new and' useful Manufactura@ of CestNuts; and I hereby declare the following to be a. full, clear, and exactdeseription thereof, reference being` limito the accompanying drawings,marking part of-this specification.

This` invention relates to :t mode of' forming east nuts?\vith,'ehennels et those opposite portions of their threaded surface,eorresponding tothe seern or parting of the eorc,wherehy any fault,step, or Want of continuity, incident to the use of e worn or otherwiseniperfeet core-box, is pleeed out of Contact with thethread of' the boltern-Xie, the said chan-nels 4also permitting the escape ,ofAdir-t. l V

`Figure 1 is an axial section of the corle-box.

Figure 2 is :i side elevation of the core.

Figure Sisarvertiezil section vof the inskJvith the nut-pettern inposition.

Fignre is n similar section with the core in position and the nut east.'Fignre' is a perspective view of the finished nut; v

I Figure 6 is a trnnsversesection ofthe same.

A and B nrevo parts of?. a metallic core-box, having an interiorserew-thread, corresponding to that of the-desired nuty'ndicomposerl ofprejectin ridges C, interrupted in the plane of the parting et D and D',so :Is to form u. core, E, with diznnetriedl fillets or elevz'ttedportions F, whose effect in the east nut is to form diametrienl guttersH Il, as deep as the bottoms of the screw-threads.

' '.lhe oilice ofl the gutters II II is o remove from cont-.ict withtheserew-thrend of` the axle, with which the nut is to beused,`wha.tever step or fault Inuy'hawe been 'imprinted bytheparting-joint in the process of casting.'

I claim herein as new, and of my invention- A cast'serew-nnt, whosethreads nre interrupted et the parting-seam, es set forth'.

In testimongr of which inventin, I have hereunto set my hand.

. eno. 15. DARROW.

' Witnesses:

Oeuvres KNIGHT, .Timms H.'LAYMAN. y

